The following HVAC practice test has been prepared by
ENERGY
MARKETING SERVICE to help you prepare for
the state licensing exam... The questions are
representative of those you will face on the actual exam. You will need
the International Mechanical Code, International Fuel Gas Code and ACCA Manuals
J and D to take this exam. The test should be timed for 2 hours. If
you feel you need help obtaining your license please see our "GUIDE TO PASSING THE
HVAC EXAM". It is only $97 and considered by most examinees to be
more valuable than a $400 cram course.

Practice HVAC exam

1. A LICENSEE MAY HAVE HIS LICENSE REVOKED FOR WHICH OF THE FOLLOWING:

MISCONDUCT GROSS NEGLIGENCE INCOMPETENCY ALL THE ABOVE

2. WHICH OF THE FOLLOWING DOES NOT REQUIRE DISPLAY OF A LICENSE NUMBER?

CONTRACTS YELLOW PAGE ADS VEHICLE SIGNS PROPOSALS

3. IF A CONTRACTOR WORKS ON 15% PROFIT, WHAT WOULD HIS SALES HAVE TO BE TO MAKE $75,000?

$500,000 $112,000 $862,500 $600,000

4. A CONTRACTOR PAYS $750 FOR A FURNACE PLUS 7% TAX. WHAT WOULD HIS SALES PRICE BE IF HE WISHED TO MAKE 30% GROSS PROFIT?

$1028 $1043 $975 $1146

5. THE MINIMUM INSULATION THICKNESS FOR REFRIGERANT LINES FOR A RESIDENCE IS ____.

1/4" 3/8" 1/2" 5/8"

6. THE DISTANCE FROM A METER TO A NATRUAL GAS WATER HEATER (40,000 BTUH) IS 30 FEET. 20 FEET FURTHER DOWN THE LINE IS A FURNACE (120,000 BTUH). WHAT IS THE MINIMUM PI[E SIZE THAT MUST BE USED BETWEEN THE WATER HEATER AND FURNACE? (PRESSURE DROP = .05)?

3/8" 1/2" 3/4" 1"

7. A HOUSE HAS A HEAT LOSSS OF 48,000 BTUH AT 20-DEGREE OUTDOOR TEMPERATURE. WHAT IS THE HEAT LOSS AT 40-DEGREE OUTDOOR TEMPERATURE?

124,000 BTUH 28,800 BTUH 19,200 BTUH 18,000 BTUH

8. A CEILING HAS A TOTAL U-VALUE OF .07. WHAT IS THE NEW R-VALUE IF R-19 IS ADDED?

30.28 31.28 32.28 33.28

9. A 30' X 8' PARTITION (2 X 4 STUDS, GYPSUM ON BOTH SIDES, NO INSULATION) SEPARATES TWO ROOMS HAVING A TEMPERATURE DIFERENCE OF 20 DEGREES. WHAT IS THE WINTER HEAT LOSS THROUGH THE PARTITION?

15,360 BTUH 3,535 BTUH 1,500 BTUH 2,609 BTUH

10. A 75,000 BTUH (INPUT RATING) 80% AFUE FURNACE HAS A TEMPERATURE RISE OF 45-DEGREES. WHAT IS THE CFM?

1212 1667 1515 1175

11. A CUSTOMER MOVES UP FROM AN 8 SEER TO A 13 SEER AIR CONDITIONER. WHAT WOULD HIS YEARLY SAVING BE IF HE WAS PAYING $650 PER YEAR FOR AIR CONDITIONING

$325 $260 $197 $250

12. A HEATPUMP IN A RESIDENCE MUST BE CONTROLLED BY WHICH OF THE FOLLOWING?

A PROGRAMABLE THERMOSTAT A DEVICE TO PREVENT SUPPLEMENTARY HEAT FROM COMING ON IF HEAT PUMP CAN HANDLE THE LOAD ALONE A DEVICE THAT ALLOWS SUPPLEMENTARY HEAT OPERATION DURING DEFROST CYCLES EXCEEDING 15 MINUTES A FOSSIL FUEL KIT

13. IN A ROOM THAT IS LARGE IN COMPARISON WITH THE SIZE OF THE EQUIPMENT, AN APPLIANCE THAT REQUIRES 18" CLEARANCE ON ITS SIDES, MAY HAVE ITS CLEARANCE REDUCED TO ______ IF .024" SHEETMETAL WITH A VENTILATED AIR SPACE IS USED TO PROTECT THE COMBUSTIBLE SURFACE.

9 6 12 MAY NOT HAVE CLEARANCE REDUCED

14. WHAT IS THE VELOCITY OF 1400 CFM OF AIR IN A DUCT MEASURING 12" X 30"?

360 FPM 467 FPM 3.8 FPM 560 FPM

15. CATEGORY I GAS EQUIPMENT MAY BE VENTED WITH WHICH OF THE FOLLOWING TYPES OF VENTS?

SINGLE WALL METAL TYPE B CHIMNEY WITH CLAY LINER ALL THE ABOVE

16. TWO NATURALLY VENTILATED APPLIANCES WITH A COMBINED CAPACITY OF 128,000 BTUH ARE CONNECTED TO A COMMON B-VENT, 18' HIGH WITH TWO 90-DEGREE ELBOWS. WHAT SIZE COMMON VENT SHOULD BE USED?

4" 5" 6" 7"

17. THE MAXIMUM ALLOWABLE HORIZONTAL LENGTH OF A CATEGORY I APPLIANCE VENT CONNECTOR IS _______ FEET FOR EACH INCH OF ITS DIAMETER.

1/2 1 1-1/2 2

18. THE MAXIMUM HORIZONTAL LENGTH OF A SINGLE WALL CONNECTOR IS ______% OF THE HIEGHT OF THE CHIMNEY OR VENT.

50 75 100 150

19. IN ORDER TO SUPPLY OUTDOOR COMBUSTION AIR USING THE TWO OPENING METHOD WITH HORIZONTAL DUCTS, WHAT SIZE WOULD EACH DUCT HAVE TO BE TO HANDLE A 140,000 BTUH FURNACE

7" X 10" 3.5" X 10" 14' X 10" 8.5" X 10"

20. IF A GALLON OF OIL CONTAINING 140,000 BTU'S SELLS FOR $1.25, HOW MUCH WILL 1,000,000 BTU'S COST WHEN USED IN AN 80% AFUE OIL FURNACE

$8.93 $14.00 $12.78 $11.16

21. IN WHICH OF THE FOLLOWING AREAS MAY A SINGLE WALL MOUNTED, 4000 BTUH UNVENTED GAS HEATER EQUIPED WITH AN OXYGEN DEPETION SENSOR BE ALLOWED?

SLEEPING ROOM BATHROOM STORAGE CLOSET SURGICAL ROOM

22. GAS APPLIANCE CONNECTORS SHALL NOT PASS THROUGH ANY OF THE FOLLOWING EXCEPT

WALLS APPLIANCE HOUSINGS FACTORY BUILT FIREPLACES FLOORS

23. RECLAIMED REFRIGERANTS SHALL NOT BE REUSED IN A DIFFERENT OWNERS EQUIPMENT UNLESS TESTED AND FOUND TO MEET THE PURITY REQUIREMENTS OF

ASHRAE 34 NFPA 54 ASTM A53 ARI 700

24. AN AIR CONDITIONER HAS HIGH SUCTION AND A LOW HEAD PRESSURES. WHAT WOULD BE A LIKELY CAUSE?

25. A HOUSE HAS A HEATING LOAD OF 48,000 BTUH. HOW MANY CFM ARE REQUIRED FOR A ROOM WITH A HEAT LOAD OF 5200 BTUH, USING A FURNACE WITH A 1200 CFM BLOWER?

1112 112 133 468

26. WHAT IS THE DESIGN FRICTION RATE WHEN THE AVAILABLE STATIC PRESSURE FOR THE DUCT SYSTEMIS .36" WC AND THE RUN WITH THE LONGEST EFFECTIVE LENGTH IS 375 FEET?

.10" WC .08" WC .05" WC .15" WC

27. A BLOWER WITH AN EXTERNAL STATIC PRESSURE OF .55" WC IS CONNECTED TO A 70 FT. LONG DUCT. THE SYSTEM INCLUDES REGISTERS AND GRILLS (.03" WC EACH), A COOLING COIL (.15" WC) AND FILTER (.10" WC). WHAT IS THE TOTAL AVAILABLE STATIC PRESSURE REMAINING FOR SIZING THE DUCT?

33. WHEN THE COOLING COIL IS LOCATED IN THE SUPPLY PLENUM OF A WARM AIR FURNACE, THE FURNACE BLOWER SHALL BE RATED AT NOT LESS THAN _____ " WC UNLESS THE FURNACE IS LISTED AND LABLELED FOR USE WITH A COOLING COIL.